Oh, and by the way, what does it mean the text "There is currently no enforced time limit for the evaluation" in http://www.sublimetext.com/2 ? I mean, I would pay for the program, no doubt. But if I didn't, what would it happen?

I'd recommend taking a look at the course on net tuts (link) if you haven't already. Some of the things are targeted towards web development, but since the videos are broken up, you can skip those. It covers a handful of features/plugins you may find useful.